* {
    margin: 0;
    padding: 0;
}

.middle {
    display: flex;
    justify-content: center;
    align-items: center;
    /*height: 400px;*/
}

.middle > div > div {
    display: flex;
    justify-content: flex-start;
}

.success-tips {
    color: blue;
}

.error-tips {
    color: red;
    background-color: yellow;
}

/*#wangEdit {*/
/*    height: 500px;*/
/*}*/